Abstract
Three new coordination polymers with the formulas of {[Co(nip)(bibp)]·0.5(H2O)}n (1), [Co(nip)(bimh)]n (2), {[Co(nip)(titb)]·H2O}n (3) (H2nip = 5-nitro-isophthalic acid, bibp = 4,4′-bis(imidazol-1-yl)biphenyl, bimh = 1,6-bis(imidazol-1-yl)-hexane, titb = 1,3,5-Tris(imidazol-1-ylmethyl)-2,4,6-trimethylbenzene) were synthesized and structurally characterized. Complex 1 has 2D (36)-hxl layer topology structure. Complex 2 shows a two-fold interpenetrating 2D 44 square-grid planar network (44 - sql ) in which 1D [Co(nip)]n chains are interconnected by bimh ligand. Complex 3 possesses a 3D (3, 5)-connected topological structure with a (63)(69·8) Schlafli symbol. Furthermore, the heterogeneous catalytic oxidation activity of 1 toward methylene blue in the presence and abserence of H2O2 are investigated in aqueous solution. And both comolexes 1 and 3 exhibit selective sensing toward Fe3+ through the luminescent quenching experiments.
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